1.Grease a 9" x 5" x 3" loaf pan with shortening.,2.In a medium bowl, beat together with an electric mixer the butter, shortening, and sugar. Beat this mixture very well before adding the egg yolk (set the white aside) and continuing to beat.,______,4.Sprinkle the chocolate chips on top , lightly pressing them into the dough. Next sprinkle the marshmallows and pecans on top.,5.Next, beat the egg white until stiff. Add the brown sugar and fold it in well. Spread it on top of the nuts and marshmallows. Don't worry if the marshmallows and nuts get all mixed up into the meringue-you want this.,6.Bake at 350F for 23-27 minutes, until the meringue is nicely browned. Let cool in the pan for an hour before removing them from the pan (or else the bottom might get soggy).